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Performance characteristics of a CO2 water heater under various operating conditions.

Number: pap. ID: 240

Author(s) : BAEK C. H., HEO J. H., KANG H., et al.

Summary

An experimental study on the heating performance of a CO2 heat pump water heater was performed with the variation of operating conditions such as refrigerant charge amount, outdoor temperature, compressor frequency, EEV opening, and water mass flow rate. Based on the test results, the optimum charge amount was determined as 1600 g. At the water mass flow rates of 75 and 85 kg/h, the water heating temperatures were 67 and 60°C and the COPs were 2.55 and 2.7, respectively. In addition, the water mass flow rate and the compressor frequency were varied to maintain the water heating temperature above 60°C with a decrease in outdoor temperature. From the test results, the recommended water mass flow rate was 75 kg/h at the outdoor temperatures of 2 and -3°C, and 65 kg/h at the outdoor temperature of -8°C.

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Pages: 7 p.

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Details

  • Original title: Performance characteristics of a CO2 water heater under various operating conditions.
  • Record ID : 30001098
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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